S+S Regeltechnik Rymaskon 600, Руководство по эксплуатации

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Operating instructions
RYM
ASKON
® 600 - BACnet
RYM ASKON ® 600 - Modbus
INSTALLATION
CONFIGURATION
Terminating resistors may only be installed at the ends of the bus line.
No more than two line terminators are permitted in networks without repeaters.
The bias resistors for bus level definition in the idle state are usually activated at the
Modbus master / repeater.
The maximum number of subscribers per Modbus segment is 32 devices.
With a greater number of subscribers, the bus must be subdivided into several
segments separated by repeaters. The subscriber address can be set from 1 to 247.
A cable with a twisted-pair data line / power supply line and copper shielding braid must be
used for the bus line. The line capacitance should be less than 100 pF/m (e.g. Profibus cable).
The communication interface must be configured from the unit (see parameter table - System page 42).
All other parameters can also be changed via the Modbus master.
Changed communication parameters are activated when Setting Mode is exited; the unit performs a
soft reset. Alternatively, the new settings can also be activated by switching the unit off and on again
(deactivate and reactivate supply voltage).
The configuration parameters are stored in the non-volatile memory of the controller.
After changing the configuration via the display, the new parameters are saved when the controller
returns to Normal Display Mode.
If the changes were made via the bus (Modbus), the parameter for updating the non-volatile memory is
required in order to force saving. If configuration takes place via the display, the parameters are saved
after an expiry time or when the settings menu is closed.
An
existing configuration
can be
transferred
to other units using the
RYMASKON USB-CT
configuration tool (see next page).
General layout of bus structure
Slave n
MODBUS
RTU-Master
RS-485
Line
termination
Line
termination
Active
branch
Passive
branch
Stub line
Trunk line
Stub line:
shorter 20m
Multiple branch n:
shorter 40m/n
General layout of bus structure
Slave 1 Slave 2
LA LA
Bus topology with terminating
and bias resistors
Bus topology with terminating and bias resistors
A (D1) D+
B (D0) D–
MODBUS
RTU-Master
Slave 1 Slave 2
5 V
Common
(GND)
Line
termination
Pull-down /
bias resistor
Pull-up /
bias resistor
R
BIAS
R
BIAS
R
AB
Line
termination
R
AB